<div class="search">
    <form id="J_searchForm" action="./list/" method="get" onsubmit="return false">
        <div class="input">
            <input type="search" id="J_keyword" placeholder="请输入手机名称" />
        </div>
        <div class="btn">
            <button type="submit" class="J_searchBtn iconfont icon-search"></button> 
        </div>
    </form>
</div>